Herro Sephyder,

The easiest way to beat him I did was Regurgitation style set MAB eat a cream puff bring Elixers and Yags

Stay far back and cast on him. Keep refueling up reducing the wait time helps bind should stick for 20-25 seconds or so...

(It did for me anyway I was under in skill around 235) anyway tell me if it works out for you. I Beat GK5 on BLU on 3 charcters Elv.Jadakiss(Ragnarok) Elv.Getem(Carbuncle) Taru.Bluehare(Carbuncle).